aaron.ballman added a comment. In D157297#4590886 <https://reviews.llvm.org/D157297#4590886>, @pengfei wrote:
> BTW, maybe @aaron.ballman knows why we don't support such syntax in C++. The return statement expects an expression or braced init list: http://eel.is/c++draft/stmt.jump#general-1 but we really only need to care about the expression form (there's no braces in sight). Grammatically, the leading `::` will parse as a qualified-id because it matches the production for nested-name-specifier: http://eel.is/c++draft/expr.prim.id.qual#nt:qualified-id That needs to be followed by an unqualified-id (http://eel.is/c++draft/expr.prim.id.unqual#nt:unqualified-id), but the open paren does not match any of the grammar productions, so this is a syntax error. CHANGES SINCE LAST ACTION https://reviews.llvm.org/D157297/new/ https://reviews.llvm.org/D157297 _______________________________________________ cfe-commits mailing list cfe-commits@lists.llvm.org https://lists.llvm.org/cgi-bin/mailman/listinfo/cfe-commits
